Device for forming eyes on metal strips



Dec. 9, 1924. 1,518,654

' G. N. HAMMOND DEVICE FOR FORMING EYES ON METAL STRIPS Filed July 11,1923 2 Sheets-Sheet 1 IN V5 11/ TOR Q A. HA MOND,

A TTOR/VEYS WITNESSES G. N. HAMMOND DEVICE FOR FORMING EYES ON METALSTRIPS Filed July 11, 1923 2 Sheets-Sheet 2 ATTORNEYS Patented Dec. 9,1924.

UNITED STATES PATENT, OFFICE.

GILBERT NAHUM HAMMOND, OF POMONA, CALIFORNIA.

DEVICE FOR- FOIRMING EYES 0N METAL STRIPS.

Application filed July 11, 1923.

forming eyes in metal strips, and has for its object the provision of adevice which is simple in construction and positive in action and whichprovides for a ready detachable carriage swingably mounted on the pinthat forms a part of the usual spring shackle normally engaged by theeye on the end of said spring, the pin being rcmovably held by the eyeforming support.

A further object of the invention is the provision of a device having asupport which is equipped with a combined holding means for the usualpin adapted to be employed in the formed eye and a gauge prer determinedby the thickness of the metal strip upon which the eye is formed.

Another object of the invention is the provision of a device having aslotted support and a swingable carriage detachably mounted on thesupport with the hangers for the carriage movable through the slottedportion of the support.

A still further object of the invention is the provision of a devicehaving a support equipped with a jaw adapted to rigidly grip one end ofthe strip of metal to be formed into an eye and adjustable toward oraway from the support with means for causing the jaws to grip the metal,said means being slidable with the jaw when the same is ad justed to apredetermined position.

lVith the above and other objects in view, the invention consists ofcertain novelfeatures of construction as hereinafter shown and describedand then specifically pointed out in the claims.

In the drawings:

Figure 1 is a view in perspective of the eye-forming device secured to atable,

Figure 2 is a vertical section longitudinallv of the same,

Figure 3 is a fragmentary plan view of the support of the eye-formingdevice,

Serial No. 650,926.

Figure 4 is a fragmeneary view in perspective of a strip of metal havingan eye formed upon it by my device,

Figure 5 isa view in perspective of the movable guide,

Figure 6 is a perspective view of the end of the support showing theslotted formation, and

Figure 7 is a view in perspective of the gauge plate. Referring moreparticularly to the drawings, 1 designates a table upon which a support2 in the form of a plate is rigidly sew cured, with the forward slottedend of the plate projecting beyond the end of the table. The forward endof the plate is provided with slots 3 and 4 forming a tongue 5 betweensaid slots and which is bevelled at G to provide a knife edge 7. Thetongue 5 falls short of the outer ends of tongues 5 and 9, with theknife edge 7, shown more particularly in Figure 2, extending to one sideof the axis of a pin 10.

Extending longitudinally of the support 2 with their inner edges inalinement with the outer edges of the slots 3 and 4 are rails 11 and 12Each of these rails are provided at their ends with bosses havingvertical perforations in which are inserted threaded pins 13. Each ofthese pins is provided with a wing nut 1 1 rigidly connected with thepin whereby turning of the nut turns the pin. As shown more particularlyin Figure 3, the pins are provided with nuts 15 engaging the underfaceof the rails 11 and 1.2. The pins extend entirely through the table top1 and are locked to the table bv means of a nut 1.6. The pins have athread ed engagement with perforations in the support or plate 2.

Midway of the end of the rails 11 and 12 are provided similar bosseshaving perforations through which are inserted threaded pins 17. Thesepins likewise extend through the table top 1, are provided with lookingnuts 15 functioning in thesame manner as the nuts on the pins 13, andengage threaded perforations in the support 2. These pins are providedwith wing nuts 14 rigidly connected with the pins.

At the outer ends of the rails 11 and 12 are provided bosses 18 havingvertical passages. Pins 19 are inserted through these passages andextend downwardly and lo- -ated in sockets formed in the outer end ofthe tongues 8 and 9.

Lugs 21 projecting upwardly from the tongues 8 and S) are adapted to beinserted in perforations 22 located on the inner end of gauge plates 23.A second perforation 24 is formed midway of the ends of each plate 23and adapted to receive the adjacent post 19. The lugs 21 and the posts19 prevent shifting of the gauge plates. These gauge plates areinterchangeable with gauge plates of varying thicknesses, the thicknessof said plates being determined by the thickness of the strip 25 ofmetal which isadapted to be inserted in the eye-forming device with theinner end of the strip located between the horizontal pin 10 and thebevelled tongue It will be seen that the pin 10 resting on the gaugeplates 23 at its outer end will be raised sufficiently above the support2 to permit ready insertion of the strip of metal 25.

This strip of metal is held in place on the support 2 by means of aguide-bar 26. The guide bar 26 extends longitudinally of the support andis rigidly secured to its upper face and within the confines of. thealined threaded pins 13 and 17. A movable guide bar 27, which isadjustable towards or away from the other edge of the strip of metal 25,is slidable transversely of the support 1 and provided with an operatinghandle 28 which is held in position by means of the guide bar 29. A setscrew having threaded engagement with a vertical passage in the guide 29locks thevhandle 28 in any one of its predetermined positions with theinner. edge of the guide bar 27 in engagement with one side edge of thestrip of metal 25.

vA swingable carriage 29 is provided with a pair of hangers 30 and 31which are of a V-shaped formation and adapted to be hooked over the pin10 as shown in Figures 1 and 2. The hangers 30 and 31 are respectivelyformed integrally with tracks 32 and 33. These tracks are spaced fromeach other and connected at their lower end to an enlarged sleeve 34which is integrally formed with the hollow barrel 35 forming a. handlefor the movable carriage 29 Movable between the tracks 32 and 33 is across head having upstanding arms 37 which are slidable in said tracks.A jaw 38 which is substantially V-shaped has a gripping edge 39. Thisjaw is provided with trunnions 40. shown in dotted lines in Figure 2,which are pivotally mounted in the opposite spaced arms 37. I

Projecting rearwardlv of the jaw 38 arelug 46 formed at one end of anoperating lever 47. The lever is provided with ears 48 disposed in anopposite direction from the lug 46, with the ears pivotally mounted on apin 49. This pin is mounted in ears 5O projecting laterally from aslidable sleeve 51 on the barrel 35.

A. cylindrical member 52 projects downwardly from the cross head 36 andis provicled with an internally threaded passage into which is screwedone end of an adjusting rod 53. At a point adjacent to the lower end ofthe threads 54 on the rod 53- and at the upper end of the enlargedcylindrical member 34 where the tracks 32 and 33 are connected with themember 34 is a collar 55.

The rod 53 extends entirely through the hollow barrel 35 and is providedwith an operatinghandle 56 which when actuated, rotates the rod 53 andmoves the cylindrical member 52, the cross head 36 and likewise the aw38 towards or away fromthe pin 10. The sleeve 51. carrying the operatinglever 41 and the operating rod 43. is likewise carri-ed towards or awayfrom the pin 10 simultaneously with the jaw 38.

A lug 57 formed integrally with the cylindrical extension 52 dependingfrom the jaw, projects laterally, outwardly from the tracks 32 and 33and is movable therebetween. A. threaded perforation is provided toreceive the threaded. end 58 of a rod 59. The lower end of-the rodcarries an eye 60 engaged with a pin 61 mounted in cars formed on thecollar 51 and above the ears 50. The rod 59 is likewise carried upwardlywith the jaw 38. A spring 62 having one end con nected to the pin 61 andits other end secured to the pin 1-5 is adapted to maintain theoperating lever 47 in outward relation with the barrel 35.

The operation of my device When it is desired to form an eye 63 on astrip of n'ietal, as shown at 25 in Figure 4, the guide bar 27 is movedaway from the longitudinal. center line of the support 2 after therelease of the set. screw 30 until the strip will fit between the guidebars 26 and 2?. locking the guide bar 27 in position. The strip of metalis moved forwardiyuntil its forward end is located slightly beyond thevertical diameter of the pin shown in Figure 2. a

The operating handle 56 is rotated until the jaw 38 is movedsuiiiciently upward whereby the biting edge 39 of said jaw will engagethe strip of the metal. at a point substantially in a line with thevertical diameter of the pin'lO. The lever 4 is then grasped and pressedinto engagement with the barrel. when the biting edge 39 will firmlygrip the end of the metal strip 25 and rotation of the carriage 29 willcause the inner end of the metal to be pulled foris as follows:

The screw 30 is then reset for fit) wardly and bent around the pin andcurved into an eye, as shown at 63 in Figure l. If necessary the jaw 38may be released from the metal and a second grip may be taken. Furtheroscillation of the carriage 29 will complete the eye on the metal strip25. Before the metal is bent into shape gauge plates will be selected ofthe same thickness as the metal and be positioned as shown in Figure 1.This raises the pin 10 at the same height above the support 2 as is theupper surface of the plate and the upper surfaces of the gauge platesare in the same horizontal plane with the upper face of the metal strip25.

lVhen it is desired to release the carriage 29 from its swingingposition on the pin 10 the crank 56 is operated in a direction towithdraw the jaw 38 from its close association with the pin 10. Thecarriage 29 is located in substantially horizontal position when thehangers 30 and 31 may be released from the pin 10. The strip of metal 25may then be readily removed from the support 2 with the pin in positionin the eye. By the adjustment of the wing nuts 1-iiand 14. the rails 11and 12 may be properly positioned horizontally in order that the outeredges of said rails will be in engagement with the ends of the pin '10and aid in maintaining said pin in position on the support 2.

The carriage 29 may be applied to the support 2 and likewise to the pin10 by placing the carriage in a horizontal position after the crank 56has been rotated to withdraw the jaw 38 sufficiently from the ends ofthe hangers 30 and 31 when the hangers may be hooked over said pin.

It. will be noted that the hangers 30 and 31* operate in the slots 3 and1, thereby -iern'iitting the upper end of the carriage to work at apoint slightly to the rear of the forward end of the support 2 andprovide for better fulcruming of the carriage 29 on the pin 10.

Vhen the crank 56 is operated for causing the cylindrical slide 52 tomove towards or away from the pin 10, the sleeve 51, operating lever 47,and operating rod 13 will be carried towards or away from the pinsimultaneously with the jaw 38.

lVhat I claim is:

1. A device for bending the ends of metal strips to form eyes comprisinga support provided with spaced parallel slots at the forward end andrunning longitudinally for a portion of the length of the support,spaced rails mounted in spaced relation above the support with a railadjacent each slot, means for adjusting the rails relative to thesupport, a gauge plate mounted ad jacent each slot and at the end of thesupport, posts removably mounted in the forward end of the rails andhaving connection with the forward ends of the support upon one side ofthe slot, the gauge plates being provided with perfo'ations adapted toreceive the posts, the space between each gauge plate, forward ends ofthe rails and posts adapted to receive the ends of a pin around whichthe metal strip is adapted to be bent, a detachable carriage swingableon the pin, a jaw pivotally mounted on the carriage, means for rockingthe free end of the jaw into engagement with the pin, and means formoving the jaw toward or away from the end of said carriage.

2. A device for bending the ends of metal strips to form eyes comprisinga support provided with spaced parallel slots at its forward end withthe slots running longitudinally for a portion of the length of thesupport, spaced rails mounted in spaced relation above the support,means for adjusting the rails relative to the support, interchangeablegauge plates located on an end of the support, and upon opposite sidesof the slots, means for maintaining the gauge plates in position, a pinlocated between the forward end of the rails and the forward end of thesupport, and resting upon the gauge plates, the gauge plates raising thepin a distance above the support equal to the thickness of the metaladapted to be provided with an eye, guides mounted on the support fordirecting the strip of metal longitudinally of the support, a carriageprovided with spaced arms having hooks engage-able over the pin with thearms movable through the slotted portion of the support, a aw pivotallymounted in the carriage having a gripping edge, means on the carriagefor moving the gripping edge into engagement with the strip of metalresting on the support, the spaced arms on the carriage forming tracksin which the jaw slides, and means for adjusting the jaw towards or awayfrom the pin.

3. A device for bending the ends of metal strips to form eyes.comprising a support provided with spaced slots at one end, a pinmounted at said end of the support, means for removably retaining saidpin on the support, a carriage swingablv mounted on the pin provided.with spaced hangers adapted to be hooked on the pin with the hangersmovable through the slots, tracks formed in the spaced hangers, a crosshead slidable in the tracks and provided with a longitudinally threadedpassage, a jaw pivotally mounted on the cross head and movable with thecross head towards or away from the pin, a barrel depending from thehangers, a rod rotatably mounted within the barrel with one end having athreaded engagement with the internally threaded passage in the crosshead, means for rotating the rod for moving the cross head and jawtowards or away from the pin, a sleeve slidably mounted llii on thebarrel, a lever pivotally mounted onthe slidable sleeve, and meansoperatively connecting the lever with the movable jaw.

4.. A device for bending the ends of metal strips to form eyes,comprising a support provided with spaced slots at one end, a pinmounted at said end ol 'the support, means for ren'iovably retainingsaid pin on the support, a carriage provided with spaced hangers adaptedfor swingably mounting the carriage on the pin, with said hangersmovable through the slots, at cross head slidably mounted between thespaced hangers and provided with a longitudinally threaded passage, ajaw pivotally mounted on the cross head and having a biting edge rock;abletowards or away from the pin, a barrel depending from the hangers,arod rotatably mounted within the barrel with one end having a threadedengagement with the internally threaded passage in the cross head,asleeve slidably mounted on the barrel, a lever pivotally mounted on theslidable sleeve, means operatively connecting the lever with the movablejaw whereby actuation of the lever rocks the jaw, and means connectingthe cross head with the slidable sleeve whereby rotation of the rod inthe barrel causes simultaneous movement of the cross head and saidsleeve.

5. A device tor bending the ends of metal strips to form eyes comprisinga support provided with spaced slots at one end, a pin resting on theends or the support, longitudinally disposed bars located above thesupport, bolts connecting the bars'adjacent the slotted end or thesupport to said support, said bolts and end of the bars forming stops tolimit the inward and upward movement of the pin, a c'n'i'iage providedwith hangers swing-ably supported on the pin, the hangers being movablethrough the slots, and means adapted to clamp the free end of the stripof metal to the pin whereby when the carriage is revolved upon the pinthe metal of the strips will be bent around the pin to form an eye.

6, in a device for bending the ends of metal strips to form eyescomprising a support provided with spaced slots at one end, a pinloosely mounted at said ends of the Support, a stop for preventing"inward and upward movement of the end of the pin, a

carriage provided with spaced hangers readily removable from andswingably suspended t'rom the pin, said hangers being movable throughthe slots, and means on the carriage adapted to rigidly engage a stripof metal and lock the free end of the strip to the pin whereby when thecarriage is rotated the meta] will be bent to form an eye around thepin, said carriage and pin being readily disengaged from the support byan outward sliding movement of said pin longitudinally of the support.

7. In a device for bending the ends of metal strips to form eyescomprising a supportprovided with spaced slots at one end, apin looselymounted at said end of the support, a stop for preventing inward andupward movement of the end of the pin, a carriage provided with spacedhangers readily removable from and swingably sus pended from thepin,said hangers being movable through the slots, and means on P thecarriage adapted to rigidly engage a strip oi" metal and loclr the freeend of the strip to the pin whereby when the carriage is rotated themetal will be bent to form an eye around the pin, a portion of thesupport between slots being cut away at its free end to permit thegripping element of the car riage to move upwardly between. the slotsand engage the metal strip, said carriage and pin being readilydisengaged from the support by an outward sliding movement oi. said pinlongitudinally of the support.

8. A device for bending the ends of meta strips to form eyes, comprisinga support provided with spaced slots at one end GX-V tendinglongitudinally tor a portion of the length of the support, a pin restingon the slotted end of the support, a stop to limit the inward n'iovementof the pin, a carriage provided with hangers receiving the pin where "1ythe carriage swingably supported from the pin, means carried by thecarriage adapted to clamp an end of the metal strip to said pin, saidcarriage, hangers and pins being readily removed from the free end ofthe support by an outward sliding movement of the pin longitudinally ofthe support. Y

GILBERT NAHUM HAMMOND.

